STICH3C Cardiac Magnetic Resonance Observational Study

iLVSD (ischemic left ventricular dysfunction) is a leading cause of heart failure (HF) and death. It is widely treated via coronary revascularization despite limited understanding of determinants of revascularization response. "Viability" imaging (to differentiate infarcted from salvageable myocardium) has been widely touted as an effective means to predict revascularization response. However prior multicenter trials have derived negative conclusions using heterogenous data with respect to both image modality and analysis. Data by our investigators and others indicate that infarct transmurality on CMR strongly impacts remodeling and prognosis after coronary revascularization. The investigators have also developed new methods (dark-blood late gadolinium enhancement-CMR) to assess infarction and shown ischemia (hypoperfusion) and non-ischemic substrate on CMR to strongly impact LV remodeling. Despite conceptual rationale, utility of multiparametric CMR to elucidate mechanism and determinants of remodeling and differential outcomes after percutaneous and surgical revascularization of iLVSD has yet to be tested. This prospective study will test the hypothesis that residual jeopardized (viable but hypoperfused) myocardium, LGE, and non-ischemic substrate after coronary revascularization (by PCI or CABG) is associated with postoperative adverse cardiovascular events